Preparation method of metal nanoparticle modified graphene composite material

Abstract

The invention discloses a preparation method of a metal nanoparticle modified graphene composite material. The preparation method comprises the steps of preparing a graphene flake and a metal nanoparticle: firstly, mixing the graphene flake, the metal nanoparticle and ethanol according to the mass ratio of (1-3): (50-100): (500-1000), and carrying out ultrasonic treatment for at least 10min to obtain a mixed solution; then, centrifuging the mixed solution at the rotating speed of 12000-16500r / min for at least three times to obtain the metal nanoparticle modified graphene composite material, wherein the lasting time for centrifuging every time is at least 10min, the metal nanoparticle is modified on the graphene flake, the graphene flake has the length of 2-4mu m, the width of 1-3mu m and the thickness of less than or equal to 1nm, the metal is one of silver, gold, palladium, platinum, copper, ferrum, cobalt and nickel, and the nanoparticle is one of a nanosphere, a triangular nanoplate, a nanocube and a nanorod. The preparation method is not only convenient and rapid, but also capable of ensuring that the metal nanoparticle in the prepared metal nanoparticle modified graphene composite material is controllable in appearance.

Description

technical field [0001] The invention relates to a method for preparing a graphene composite material, in particular to a method for preparing a graphene composite material modified with metal nanoparticles. Background technique [0002] Graphene is a single-layer carbon atom film exfoliated from graphite material, which is a honeycomb two-dimensional crystal composed of single-layer hexagonal cell carbon atoms. Based on the unique electrical, mechanical, thermal, and mechanical properties of graphene, it has received extensive attention in the fields of chemistry, physics, materials, energy, and the environment in recent years. At present, graphene and metal nanoparticle composite materials have become a research hotspot for scientists because of their excellent properties and potential application prospects in the fields of energy storage, catalysis, biomedicine, and electronic devices. For example, in October 2009 A "nano-graphene-based composite wave-absorbing material a...

AI Technical Summary

Problems solved by technology

Although this preparation method obtains a metal-graphene composite material, there are also shortcomings. First, it is difficult to effectively control and adjust the morphology of the metal or oxide attached to the graphene; second, the steps are cumbersome. , the process is complicated, which is not conducive to the industrial scale production and commercialization of the final product.

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